Question

The length of a rectangular playground is thrice it's breadth. If the perimeter of the playground is 56m, find is dimensions.

Answer 1

Answer:

Length = 21cm

Breadth = 7cm

Step-by-step explanation:

Let l=x

B=y

given,

x=3y

Perimeter=2(l+B)

56=2(y+3y) [x=3y]

56=2(4y)

y=7cm

x=3*7=21cm

Answer 2

Given :

• The length of a rectangular playground is thrice its breadth.
• The perimeter of the playground iams 56 meters.

To find :

• Dimensions of the rectangular playground =?

Step-by-step explanation :

Let, the breadth of the rectangular playground be, y.

Then, the length of the rectangular playground, 3y.

As We know that,

Perimeter of the rectangle = 2(length + breadth)

It is Given that,

The perimeter of the playground is 56m.

So,

56 = 2(3y + y)

56 = 2 × 4y

56 = 8y

y = 56/8

y = 7

Hence,

The breadth of the rectangular playground, y = 7 m.

Then, the length of the rectangular playground, 3y = 3 × 7 = 21 m.